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Sassy PaleoNerd

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Hello there! A year ago I bought a fossil fish from Brazil at a convention, yet I am unaware of the animals genus.

 

The fossil has a lenght of 37 cm's, and a skull the lenght of 7 cm. 0,7 cm is the average lenght of the individual vertebrae, 39 vertebrae are vsible in the fossil.

 

Skull bones:

Maxilla: 4 cm

Subopegulum: 4.6 cm (lenght) 3 cm (height)

Operculum: 4.6 cm (lenght) 3.5 cm (height)

Dentary: 3,2 cm

 

Height of Tail Fin: 7.9 cm

 

Age Location:

Presumably Romualdo Formation, based on Matrix and Preservation

Aptian-Albian

 

More Pictures in the comments, I am, somehow to dumb to know how to make an image smaller

20191220_161336.jpg

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Looks a bit like a “Frankenstein-fish”  I see a connection between the head and body, the tail looks too small, and the entire fish looks like it’s in an artificial matrix  

 

That being said, I’m no expert at all on the Brazilian fish.  

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Definitely a franken-fish. 

 

 

 

20191220_162101.thumb.jpg.882894822dc4bb240a8068ce694a1c5b.jpg

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    Tim    -  VETERAN SHALE SPLITTER

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I'm not convinced this is a composite. I've prepped a ton of these fish concretions both from Brazil and Morocco and the fish in them are often really messed up. I don't think the vertebrae are differently sized. Rather,  I think it is a very poor prep and the vertebrae have been prepped away in areas. There is definitely filler between the head and the body but that could just be where the concretion broke.

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That said, the skull does resemble a very small Cladocyclus sp. 

 

As a side note, anyone interested in the fish from Brazil should get a copy of "Santana Fossils: An Illustrated Atlas" ... edited by John Maisey.     ;) 

 

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

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"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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2 minutes ago, Ptychodus04 said:

I'm not convinced this is a composite. I've prepped a ton of these fish concretions both from Brazil and Morocco and the fish in them are often really messed up. I don't think the vertebrae are differently sized. Rather,  I think it is a very poor prep and the vertebrae have been prepped away in areas. There is definitely filler between the head and the body but that could just be where the concretion broke.

I am unsure, due to the weird anal fin area. Those look like regular ribs, to me?  :headscratch:

A photo of the back side may help to discern it's authenticity.

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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1 minute ago, Ptychodus04 said:

I'm not convinced this is a composite. I've prepped a ton of these fish concretions both from Brazil and Morocco and the fish in them are often really messed up. I don't think the vertebrae are differently sized. Rather,  I think it is a very poor prep and the vertebrae have been prepped away in areas. There is definitely filler between the head and the body but that could just be where the concretion broke.

It's indeed broken at those points, the cross section shows that it's the same material, not sure about the fin though, it's indeed the part I was worryed about.

 

@Fossildude19 @Xiphactinus

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6 minutes ago, Fossildude19 said:

I am unsure, due to the weird anal fin area. Those look like regular ribs, to me?  :headscratch:

A photo of the back side may help to discern it's authenticity.

I will post a photo of the backside of the fossil once I get home then ;)

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6 minutes ago, doushantuo said:

I'd never buy a fish with a "subopegulum"",BTW.:D

In other words,Sassy: I think that's a spelling mistake

 

darn it! I meant subopergulum

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Still not right. :ninja:

Hint: If there's an operculum

Taphonomywise, your specimen is slightly reminiscent of:

(from: Starr Jordan's Peixes Cretaceos de Ceara)

starcsils08955e86a2489c2878f66.jpg

 

 

 

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14 minutes ago, doushantuo said:

still not right:ninja:

Hint: if there's an operculum

Taphonomywise,your specimen is slightly reminiscent of

starcsils08955e86a2489c2878f66.jpg

It looked like a g on this image ):

Screenshot_20191220-183941_Google.jpg

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Hey, no worries, you don't have to explain.

I my mistakes on this forum were laid end to end, we might yet end up with a road to the Cassini division.

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Just now, doushantuo said:

hey,no worries,you don't have to explain.

I my mistakes on this forum were laid end to end,we might yet end up with a road to the Cassini division

Which is coincidentally where my Secret Santa gift went via. 

And "I my..." proves your point.;)

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

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This is a Cladocyclus gardneri. In any case not well preserved and prepared - possibly also partly composed of several specimens.
I also have such a thing - doesn't look better either.

They're like this - if you don't want to spend real money….

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Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC).

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This is from the book "Santana Fossils: An Illustrated Atlas" ... edited by John Maisey.

Clado.thumb.JPG.7b872b2b624a8b4b8889164fd84640c3.JPG

 

 

Cladocyclus.JPG.8c72c1f1ff7c08b8e24a375ae29896c7.JPG

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Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC).

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2 hours ago, Sassy PaleoNerd said:

Backside @Fossildude19

20191220_202037.jpg

 

By the way, the matrix around the fish is added - this is (very likely) not the original matrix in which the fish was found (might be concrete or mortar). Please take a picture of the edge of the broken part.

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Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC).

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1 hour ago, oilshale said:

 

By the way, the matrix around the fish is added - this is (very likely) not the original matrix in which the fish was found (might be concrete or mortar). Please take a picture of the edge of the broken part.

Here you go

20191220_225556.jpg

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